>Try turning off the news, avoiding social media sites (Reddit, Twitter, HN, anywhere people share bad stories),
300% this.
I heard on several occasions long ago how newspapers aren't worth reading and news programs aren't worth watching. At the time I didn't understand why and thought it was bad advice, young and naive greenhorn that I was: The news is there to inform us! Being informed is a good thing!
Now that I'm approaching my mid 30s and have some wisdom under my belt (still need to accrue more!), I can properly understand and appreciate the value behind that sagely advice to ignore the news.
The news, and more aptly the media at large including social media, isn't about informing us. It's about angering us, about baiting us into feelings of sensationalism. The vast majority of the bullshit we see on the news is negative because negative stories are very effective at tugging at our heart strings. The vast majority of the content on social media is far fetched from reality because reality is fairly mundane.
It's a patent waste of time to be concerned about things that don't concern you or that you can do nothing about (eg: things happening on the other side of the continent or the fucking planet). Turn off all that bullshit, time is finite and there are much better things that time could be spent on.